51results about How to "Proper Dielectric Anisotropy" patented technology

The invention discloses a positive dielectric anisotropic liquid crystal composition. The positive dielectric anisotropic liquid crystal composition comprises 1%-40% by weight of compound with a structural formula I, 1%-50% by weight of compound with a structural formula II, 1%-60% by weight of compound with a structural formula III and 1%-80% by weight of compound with a structural formula IV, and an optically active compound accounting for 0-0.5% of the total weight of the liquid crystal composition can be additionally added. The liquid crystal composition has the advantages of suitable positive dielectric anisotropy, lower rotary viscosity, very low total response time, lower voltage and higher resistivity and voltage holding ratio, and further has broad application prospects and application values in liquid crystal display.

The invention discloses a liquid crystal composition which comprises 1-70wt% of liquid crystal compound shown by formula I, 1-90wt% of liquid crystal compound shown by formula II and 0-70wt% of liquid crystal compound shown by formula III. The liquid crystal composition disclosed by the invention has high optical anisotropy, relatively wide nematic phase temperature range, high clearing point range, relatively low rotary viscosity and proper dielectric anisotropy, thus the liquid crystal composition can realize relatively low box thickness and relatively low drive voltage of a liquid crystal lens; moreover, the liquid crystal composition has the characteristics of fast response, relatively high optical efficiency and the like.

The invention discloses a positive dielectric-aeolotropic liquid crystal composition with fast response. The positive dielectric-aeolotropic liquid crystal composition comprises the following components in percentage by weight: 1%-40% of a liquid crystal compound shown in a structural formula I, 1%-40% of a liquid crystal compound shown in a structural formula II, 1%-40% of a liquid crystal compound shown in a structural formula III, 0%-70% of a liquid crystal compound shown in a structural formula IV, 0%-70% of a liquid crystal compound shown in a structural formula V, 0%-40% of a liquid crystal compound shown in a structural formula VI, and 0%-40% of a liquid crystal compound shown in a structural formula VII; in addition, an optical rotation compound with the weight of being 0%-0.5% of the total weight of all the liquid crystal compounds is added. The liquid crystal composition disclosed by the invention is low in power consumption, low in rotary viscosity and high in response speed, and is especially applicable for manufacturing a TFT-LCD Thin Film Transistor-Liquid Crystal Display) with fast response.

The application discloses a liquid crystal composition and application thereof in liquid crystal display. The liquid crystal composition comprises compounds shown in formula I, II, III and IV. The liquid crystal composition has excellent performance, wide nematic phase temperature range, proper positive dielectric anisotropy, proper optical anisotropy, high charge retention rate, quick response, low rotary viscosity and wide application prospect and application value in liquid crystal display. By utilizing the liquid crystal composition, high charge retention rate, low power consumption and quick response time can be maintained. The liquid crystal composition is especially suitable for manufacturing active matrix EN-TFT and IPS-TFT displayers with quick response. The expression formula is as shown in the description.

Provided is a liquid crystal compound satisfying at least one physical property from among having excellent stability with respect to heat, light, or the like, a high clearing point, a low liquid-crystal-phase lower limit temperature, a low viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a suitable elastic constant, and excellent compatibility with other liquid crystal compounds. The compound is represented by formula (1). In formula (1): R1 and R2 represent C1-15 alkyl groups; ring A1 and ring A2 represent 1, 4-cyclohexylene or 1, 4-phenylene; Z1 and Z2 represent single bonds, -(CH2)2-, -CH=CH-, -C≡C-, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O-, -OCF2-, or -CF=CF-; a and b represent 0, 1, or 2; and the sum of a and b is 1 or 2.

The invention discloses a positive dielectric liquid crystal composition. The positive dielectric liquid crystal composition comprises a component A which consists of one or more liquid crystal compounds shown in a general formula I, and an additive component D which consists of one or more compounds shown in a general formula S-1, a structural formula S-2, a structural formula S-3 and a general formula S-4. The positive dielectric liquid crystal composition does not change under the conditions of high temperature and ultraviolet radiation, so that the liquid crystal quality is improved; the positive dielectric liquid crystal composition is applicable to an active matrix electric optical element and a liquid crystal display, and can be applied to civil use and practical TFT-LCDs (Thin-Film Transistor Liquid Crystal Displays) under special severe conditions.

The invention discloses liquid crystal composition with negative dielectric anisotropy. The liquid crystal composition comprises a first component comprising one or more of compounds shown in formulaI, a second component comprising two or more of compounds shown in formula II and a third component comprising one or more of compounds shown in formula III. The invention also discloses a liquid crystal display comprising the liquid crystal composition. The liquid crystal composition has proper dielectric anisotropy and proper rotary viscosity, can meet the requirement for quick response of the liquid crystal display, has characteristics of higher clearing point, wide nematic phase temperature range, higher optical anisotropy, good low-temperature mutual solubility, higher voltage retention rate, good high-temperature stability, good ultraviolet resistance and the like and is applicable to the liquid crystal display.

The invention provides a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, at least one compound of a formula II-1 and\or II-2, and at least onecompound of a formula III. The liquid crystal composition has high transmittance, high optical anisotropy, a high clearing point, appropriate dielectric anisotropy, and relatively large elastic constants K11 and K33. The invention also provides a liquid crystal display device containing the liquid crystal composition; and the liquid crystal display device containing the liquid crystal compositioncan have the advantages of high transmittance, high contrast, and the like, thereby having a good display effect.

The invention discloses a nematic-phase liquid crystal composition which is formed by two components. The first component comprises one or more chemicals in a structural formula I, and the second component comprises one or more chemicals in a structural formula II and one or more chemicals in a structural formula III. The liquid crystal composition is excellent in performance, has a wide nematic-phase temperature range, proper positive dielectric anisotropism, proper optical anisotropism, high charge retention rate, high response speed and low rotary viscosity and can maintain high charge retention rate. The composition has a wide application prospect and application value in liquid crystal display and is especially suitable for manufacturing active matrix IPS-TFT displayers with a high response speed.

The invention provides a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, at least one compound of a formula II, and at least one compound of aformula III. The liquid crystal composition has high optical anisotropy and also has relatively large elastic constants K11 and K33 while maintaining a high clearing point, appropriate dielectric anisotropy, and good low-temperature mutual solubility. The invention also provides a liquid crystal display device containing the liquid crystal composition; and the display device has the advantages offast response, high contrast, large temperature width range, and the like, thereby having a good display effect and a wide application range.

The invention relates to a liquid crystal composition, a liquid crystal display element containing the liquid crystal composition, and a liquid crystal display, and belongs to the field of liquid crystal display. The liquid crystal composition disclosed by the invention comprises compounds shown as a formula I, a formula II, a formula III, a formula IV, a formula V, a formula VI, a formula X and a formula VII, has proper dielectric anisotropy (delta epsilon), rotational viscosity and clearing point (Cp), and also has relatively high optical anisotropy (delta n) and high voltage holding ratio (VHR), so that the product quality is effectively improved; and the liquid crystal composition can be used for developing low-cell-thickness liquid crystal displays.

The invention discloses a liquid crystal composition and a photoelectric element, the composition comprising a first component and a second component. By metering with weight percentage, the first component accounts for 17% to 36.5%, the second component accounts for 63.5% to 83%, and the sum of the weight percentages of the components is 100%. The liquid crystal composition provided by the invention can achieve lower viscosity, higher delta epsilon, appropriate optical anisotropy, lower threshold voltage, higher VHR, good reliability and thermal stability, and excellent low temperature reliability, which solves the dual requirements of the novel display mode and low temperature reliability. The liquid crystal composition can be stably stabilized at temperature of -40 DEG C, and is provided for TN-TFT (twisted nematic phase), IPS (planar conversion), FFS (fringe field conversion), PSA (polymerization) mode liquid crystal display device and a reinforced liquid crystal display device, which greatly widens the application of liquid crystal display in engineering, outdoor, high altitude, high latitude and severe working conditions.

The invention discloses a fast-response positive dielectric anisotropic liquid crystal composition which comprises the following components in percentage by weight: 5-60% of a component A, 1-60% of a component B, 1-40% of a component C and 0-40% of a component D. The component A consists of at least one compound of the general formula I and at least one compound of the general formula II, the component B consists of one or more compounds of the general formula III, the component C consists of one or more compounds of the general formula IV, the component D consists of one or more compounds of the general formula V. Further, an optically active component is added and accounts for 0-0.5% of the total weight of the liquid crystal composition. The composition has a low rotational viscosity, a fast response speed and an appropriate positive dielectric anisotropy, and is particularly suitable for the fabrication of fast-response active matrix TN-TRT, IPS-TFT liquid crystal display elements and liquid crystal display devices.

The invention provides a liquid crystal composition and its application. Based on the total weight of the liquid crystal composition, the liquid crystal composition of the present invention comprises: 3-10% of one or more compounds of general formula I, 30-60% of one or more compounds of general formula II, 15-30% of one or more compounds of general formula III, 0-15% of one or more compounds of general formula IV, 5-30% of one or more compounds of general formula V , and 0-30% of one or more compounds of general formula VI. The liquid crystal composition of the present invention has proper optical anisotropy, proper dielectric anisotropy, higher clearing point, lower driving voltage and fast response characteristics, is suitable for liquid crystal displays, and satisfies high wear resistance of liquid crystal displays. Transparency and fast response requirements.

The invention discloses a liquid crystal composition and a photoelectric display device. The liquid crystal composition comprises, based on the total weight of the composition, 1-30% of at least one compound shown as a general formula I, 5-35% of at least one compound shown as a general formula II and 10-50% of at least one compound shown as a general formula III. The liquid crystal composition has a proper clearing point, proper optical anisotropy, proper dielectric anisotropy, higher voltage retention rate, higher transmittance, better high-temperature resistance and higher response speed, and is suitable for VA, IPS, FFS and other display modes.

The invention discloses a liquid crystal composition containing bicycle-octane, belonging to the field of liquid crystal display materials. The liquid crystal composition is composed of 1-40% of a positive dielectric compound containing a component A shown in the general formula I, 2-40% of a positive dielectric compound containing a component B shown in the general formula II and / or general formula III and 10-80% of a neutral dielectric compound containing a component C shown in the general formula IV; in addition, optically active compound which is 0-0.5% of the sum of the mass of the liquid crystal composition is added. The liquid crystal composition is low in viscosity, short in response time, proper in photology, good in anisotropy, proper in dielectric anisotropy and particularly suitable for manufacturing quick-response active matrix TN-TFTs (Twisted Nematic Thin Film Transistors), IPS-TFTs (In-Plane Switching Thin Film Transistors) or FFS (Fringe Field Switching) liquid crystal display elements and liquid crystal displays.